It was the images of empty food markets on the news, and reporters' overblown warnings of possible shortages, that told Spaniards on Thursday that their nation's five-century dispute with Morocco over the sovereignty of Ceuta and Melilla, two enclaves on the Mediterranean coast, had reignited. In the worst diplomatic spat between the two countries in almost a decade, Moroccan activists were blocking food imports into one of the enclaves and promising more action to come. The Spanish government and the press were appalled, not so much at the protest, but that it had taken place after King Juan Carlos himself...